Complex Terrain

Alaiz Sensitivity

Javier Sanz Rodrigo's picture
Submitted by Javier Sanz Rodrigo on May 7, 2015 - 10:22am

Scope

The benchmark is open to participants of the Wakebench project using flow models over topography in neutral conditions. This initial benchmark will carry out an assessment of the sensitivity to modeling criteria that is adopted when approaching the simulation of a realistic site for wind farms in complex terrain. In order to simplify the analysis, only the North and South wind direction sectors will be analyzed.

Objectives

Carry out sensitivity tests on different elements of the modeling chain that require user-dependent decisions: domain dimensions, mesh type and resolution, roughness definition, and wind direction binning (1).

Data Accessibility

The benchmark is offered to participants of the IEA Task 31 Wakebench who has signed the NDA attached to the test case guide.

Input data

The conditions for simulating the Alaiz flow field in neutral conditions are:

San Gregorio Freeflow

Submitted by Francesco Castellani on May 4, 2015 - 2:13pm

Scope

Participants of the Wakebench projects are invited to join the benchmark for flow models over topography in neutral conditions. Simulations need to be performed to ensure an exhaustive characterization of the wind on the main directions. Reliability of the models will be investigated using the anemometric measurements from the available met-masts.

Objectives

Produce the best estimate of the flow field in neutral conditions above the San Gregorio Magno site for the 240°, 270° and 30° wind directions.

Data Accessibility

The benchmark is offered to participants of the IEA Task 31 Wakebench who has signed the NDA attached to the test case guide.

Input data

The following input data are at disposal for simulating San Gregorio Magno flow field in neutral conditions:

San Gregorio Wakes

Submitted by Francesco Castellani on May 4, 2015 - 1:26pm

Scope

The benchmark is open to the participants of the Wakebench project using flow and wake models for complex terrains. 

Objectives

The main goal of this benchmark is to assess flow and wake models behaviour on a very complex terrain environment.

Simulations need to be performed to ensure an exhaustive characterization of the wind on the main direction sector (270°) for the wind farm sub-cluster T10, T11, T12, T13. Reliability of the models will be investigated using the anemometric and SCADA measurements.

Data Accessibility

Brief description about the accessibility of the data

Input data

The ASTER digital terrain, the roughness model (winter and summer retrieved fromwww.dataforwind.com), as well as the layout of the sub-cluster shall be provided to the participants (the coordinate system used is UTM-WGS84-33N).

The wind turbines are Siemens SWT-93 with a nominal power of 2300 kW and a hub height of 80 m; the nominal thrust and power curves shall be available.

The conditions for simulating the wind farm flow are the anemometric conditions at reference met-mast position at hub-height.

 

Mean velocity at hub height (80 m) at met-mast position:         from 5 to 9 m/s

Mean direction at hub height (80 m) at met-mast position:       from 260 to 280°

Alaiz Neutral

Javier Sanz Rodrigo's picture
Submitted by Javier Sanz Rodrigo on March 31, 2015 - 9:14am

Scope

The benchmark is open to participants of the Wakebench project using flow models over topography in neutral conditions. This benchmark is a follow up of the sensitivity analysis (Alaiz_Sensitivity) to validate the results in neutral conditions.

Objectives

Produce the best estimate of the flow field in neutral conditions above the Alaiz site for the North and South wind directions.

Data Accessibility

The benchmark is offered to participants of the IEA Task 31 Wakebench who has signed the NDA attached to the test case guide.

Input data

The conditions for simulating the Alaiz flow field in neutral conditions are: